If you were to use antibodies that were chemically bonded to a stain in order to visualize the expression pattern of a protein in a fixed tissue, what experimental techniques and equipment would be applicable?
A. antibody interference assay, bright-field microscopy
B. immunohistochemistry, dark-field microscopy
C. immunohistochemistry, bright-field microscopy
D. DAPI or Hoechst stains, fluorescence microscopy
C
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Which of the following is associated with mental retardation in Down syndrome?
A. thickening of the muscles of the tongue B. elevated levels of purines in the blood C. increased tendency toward leukemia D. increased tendency toward cataracts E. accelerated rate of aging
One kind of plasmid in bacteria is called an R plasmid. What kinds of genes are typical of such plasmids?
What will be an ideal response?
Scientists have documented that spring seasons starting earlier due to climate change have resulted in some caterpillar species beginning their maturation stage earlier than normal
There are bird species that need the caterpillars to feed their chicks. However, since the caterpillars are maturing before the chicks hatch (and therefore cannot be used for chick food), the birds are experiencing a drop in their lifetime reproductive success. Interestingly, scientists have also documented that the individual birds that are best able to change when they lay their eggs to align with earlier spring seasons have the greatest lifetime reproductive success. These phenomena are examples of ________. A) an evolutionary response to climate change B) an increase in global greenhouse gas emissions due to climate change C) a change in species distribution due to climate change D) the effects of terrestrial biome distribution due to climate change
Fish and clams are similar in that both use ________ for gas exchange.
A. the moist surface of their skin B. the mantle C. lungs D. tracheal tubes E. gills